diff --git a/litellm/anthropic_interface/messages/__init__.py b/litellm/anthropic_interface/messages/__init__.py
index 0996d62c866..f71279b226d 100644
--- a/litellm/anthropic_interface/messages/__init__.py
+++ b/litellm/anthropic_interface/messages/__init__.py
@@ -10,7 +10,7 @@ This is an __init__.py file to allow the following interface
 
 """
 
-from typing import Any, AsyncIterator, Coroutine, Dict, List, Optional, Union
+from typing import Any, AsyncIterator, Coroutine, Dict, Iterator, List, Optional, Union
 
 from litellm.llms.anthropic.experimental_pass_through.messages.handler import (
     anthropic_messages as _async_anthropic_messages,
@@ -100,8 +100,11 @@ def create(
     **kwargs,
 ) -> Union[
     AnthropicMessagesResponse,
+    Iterator[bytes],
     AsyncIterator[Any],
-    Coroutine[Any, Any, Union[AnthropicMessagesResponse, AsyncIterator[Any]]],
+    Coroutine[
+        Any, Any, Union[AnthropicMessagesResponse, AsyncIterator[Any], Iterator[bytes]]
+    ],
 ]:
     """
     Async wrapper for Anthropic's messages API
diff --git a/litellm/llms/anthropic/experimental_pass_through/adapters/handler.py b/litellm/llms/anthropic/experimental_pass_through/adapters/handler.py
index b06f3b54c31..81af38c70a0 100644
--- a/litellm/llms/anthropic/experimental_pass_through/adapters/handler.py
+++ b/litellm/llms/anthropic/experimental_pass_through/adapters/handler.py
@@ -632,7 +632,11 @@ class LiteLLMMessagesToCompletionTransformationHandler:
         AnthropicMessagesResponse,
         Iterator[bytes],
         AsyncIterator[Any],
-        Coroutine[Any, Any, Union[AnthropicMessagesResponse, AsyncIterator[Any]]],
+        Coroutine[
+            Any,
+            Any,
+            Union[AnthropicMessagesResponse, AsyncIterator[Any], Iterator[bytes]],
+        ],
     ]:
         """Handle non-Anthropic models using the adapter."""
         if _is_async is True:
diff --git a/litellm/llms/anthropic/experimental_pass_through/messages/handler.py b/litellm/llms/anthropic/experimental_pass_through/messages/handler.py
index a94c085adbb..d1a7a4f037d 100644
--- a/litellm/llms/anthropic/experimental_pass_through/messages/handler.py
+++ b/litellm/llms/anthropic/experimental_pass_through/messages/handler.py
@@ -199,7 +199,7 @@ async def anthropic_messages(
     client: Optional[AsyncHTTPHandler] = None,
     custom_llm_provider: Optional[str] = None,
     **kwargs,
-) -> Union[AnthropicMessagesResponse, AsyncIterator]:
+) -> Union[AnthropicMessagesResponse, Iterator[bytes], AsyncIterator[Any]]:
     """
     Async: Make llm api request in Anthropic /messages API spec.